# Question Video: Recalling the Typical Resting Heart Rate of a Healthy Adult Human Biology

What is a typical resting heart rate of a healthy, adult human?

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### Video Transcript

What is a typical resting heart rate of a healthy adult human? (A) 40 bpm, (B) 120 bpm, (C) 70 bpm, or (D) six bpm.

To answer this question, let’s go over a few key facts about the heart and review some key terminology as we go.

As you may know, the heart is responsible for pumping blood around the body, which supplies the organs with the oxygen and nutrients they need. The heart must beat fast enough to pump sufficient blood to the various cells of the body. The heart rate is measured by the number of beats per minute. This is often simply represented as bpm.

The heart rate is variable, which means that it can change depending on several different factors. One of these factors is a person’s state of activity. A person who is exercising has an increased need for oxygen, so the heart will beat faster. In contrast, when a person is standing still, sitting, or lying down, their heart will beat more slowly. This is called the resting heart rate.

According to the American Heart Association, the normal range for resting heart rate in human adults is 60 to 100 bpm. If a person’s resting heart rate falls outside this range, this could mean they have a health problem that needs to be investigated.

Now that we know the normal range, we can see which of our answers would fall within it. Answers (A), 40 bpm, and (D), six bpm, are both too slow. These would be considered bradycardia, or slower than normal heart rate. Answer (B), 120 bpm, on the other hand is too fast and would generally be considered tachycardia, or faster than the normal heart rate. This means that we have found the correct answer to this question. The correct answer displaying a typical resting heart rate of a healthy adult human is (C), 70 bpm.